Fire extinguishing compound



' Patented Aug. 29, 1933 UNITE-n STATES PAT r ori ice 1,924,401 FIRE EXTINGUISHING COMPOUND Acie .l. Gilleo, Detroit, -Mich., assignor to The Outrite Fire Extinguisher Corporation, Detroit, Mich., a corporation of Ohio J No 'Drawing. Application April 25, 7 Serial No. 533,001

5 Claims. (01. 23-8) 7 bonic acid gas when decomposed by heat which is coated with water-insoluble wax and thereby rendered substantially water-repellant, non-cak- .prolonged'periods the compound may be readily discharged from a container. V

Another object of the invention is to provide such a fire extinguishing compound wherein employed and the ways in which they are preferably compounded.

I utilize a water-insoluble wax, such as bees-V.

wax, which must be rendered substantially liquid. This may be accomplished by heat alone, or by heating the wax andforming a solution with the addition of carbon tetrachloride. In the latter case care must be taken that thetetrachloride is not heated to its boiling point which is relatively low.

To the heated wax, or wax solution, I add some finely powdered silicate, such as fullers earth or kaolin,-and while so doing I maintain the mixe ture in a heated state. 7 I

I then heat a finely powdered material capable of liberating carbonic acid gas when decomposed by heat, such as sodium bicarbonate, calcium carbonate or the like, to about 140 degrees Fahrenheit, which I find is a safe temperature 7 one whih will cause relatively rapid evaporation of the'carbon tetrachloride when the latter is employed. V

I pour the heated mixture containing the wax and the silicate into the heated powdered material and agitate it so that the latter becomes coated with the wax, and, as previously stated, the tetrachloride, whenemployed, is eliminated from the mixture by evaporation. i V

The powdered material and the silicate are ing and free-flowing, so that after standing for water-insoluble wax is mixedwith the aid of fication wherein I state both the ingredients powdered material liberates carbonic acid gas. sufiiciently below its point of decomposition and then found to be substantially water-repellant, free-flowing and non-caking. Moreover while a satisfactory result is obtained if the silicate is omitted I find that the latter does add to the freeflowing qualities of the compound.

Very satisfaotory results are obtained by the employment of the above ingredients in substantially the following proportions by weight:

' Percent Water-insoluble wax 1 Powdered silicate 3 Powdered material having the properties herein described 95 When carbon tetrachlorideisused it is mixed 7 with the wax in substantially equal proportion, though its addition does not ultimately change the proportions given above since it is subsequently eliminated by evaporation.

While in the foregoing the preferred ingredients, their relative proportions, and the method of compounding them has been recited, it is understood that the invention is susceptible to such alterations and modificationsas fall within the scope of the appended claims.

What I claim is:

l. A fire extinguishing compound consisting of a powdered material capable of liberating carbonic acid gas when decomposed by heat, and

beeswax with which said material is coated so as 5 to render it substantially water-repellant and free-flowing.

2. A fire extinguishing compound consisting of a powdered material capable of liberating car-' bonic acid gas when decomposed by heat, a powdered silicate, and beeswax with which said material and silicate are coated to render them substantially water-repellant and free-flowing.

3. A fire extinguishing compound consisting of a powdered material capable of liberating carbonic acid gas when decomposed by heat and a water-insoluble wax which melts at substantially the same temperature as that at which the 4. A, fire extinguishing compound consisting of ture as that at which the sodium. bicarbonate liberates carbonic acid gas.

5. A fire extinguishing compound consisting of sodium bicarbonate and beeswax.

ACIE J. GILLEO. 

